MESON Chess Problem Database

Problem Display
PID: 18414 (4R3/1N5B/2p1P3/p2k4/r7/1P6/2PPN2B/b2Q3K w - - 0 1)

Groeneveld, Cornelis

1st Prize, Tijdschrift vd KNSB, 1955

4R3/1N5B/2p1P3/p2k4/r7/1P6/2PPN2B/b2Q3K

#2

11 + 5

3105 FIDE Album (1945-1955) 1964
14668 Deceptive Chess Problems 1983
4901 Best Problems 2006
102 Probleemblad 2006
56 The Problemist 2006

SOLUTION

  • SOUND
  • Sets
    • 1...Ra2
      • 2.c4#
    • 1...Ra3
      • 2.c4#
  • Tries
    • 1.Sc3+?
      • 1...Kd4
        • 2.Rd8#
        • 2.Qg4#
        • 2.Qg1#
      • 1...Bxc3!
    • 1.Qg1?
      • threat
        • 2.Qc5#
      • 1...c5
        • 2.Qxc5#
      • 1...Rd4
        • 2.Qg5#
      • 1...Bd4
        • 2.Qg2#
      • 1...Rc4!
    • 1.d4?
      • threat
        • 2.Sf4#
      • 1...Rxd4
        • 2.c4#
      • 1...Bxd4
        • 2.Sc3#
      • 1...c5!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Rd8#
      • 1...Kxd4
        • 2.Rd8#
      • 1...Rxd4
        • 2.Qh5#
      • 1...Bxd4
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(b);N_GUARD::P(C)
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • B(a);XS(E)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • P(e);::QAR1(A),XP(e)
        • R(b);S_CUTB(a)::QAR(A)
        • B(a);S_CUTR(b)::QAB(A)
      • Refutation
        • R(b);
    • Try
      • P(D);
      • Threat
        • S(E)
      • Vars
        • R(b);N_GUARD,P_SPINR(b),XP(D)::P(C)
        • B(a);N_GUARD,P_SPINB(a),XP(D)::S(E)
      • Refutation
        • P(e);
  • Actual
    • S(E);
    • Threat
      • R(K)
    • Vars
      • K(d);P-FLIGHT,XS(E)::R(K)
      • R(b);SBLOCK,XS(E)::QAR(A)
      • B(a);SBLOCK,XS(E)::QAB(A)
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